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RECEIVABLES
 12 Months Ended
Dec. 31, 2015
Receivables [Abstract]  
RECEIVABLES

5.

RECEIVABLES

Receivables as of December 31, 2015 and 2014 consist of the following:

 

 

 

December 31,

 

 

 

2015

 

 

2014

 

Receivables

 

$

41,954

 

 

$

35,102

 

Less allowance for doubtful accounts

 

 

(2,365

)

 

 

(2,336

)

Receivables—net of allowance for doubtful accounts

 

$

39,589

 

 

$

32,766

 

 

The increase in receivables as of December 31, 2015 is due to the growth of revenues in 2015. The allowance for doubtful accounts balance as of December 31, 2015 remains relatively unchanged from the prior year end and consists of reserves established from an ongoing dispute with certain long-distance carriers that have challenged the validity of certain switched access charges.